78 FOSSIL FLORA OF THE JOHN DAY BASIN, OREGON, [bull. 204. 



If we assume the lar^-er leaflet to be the central one of a trifoliolate 

 leaf, it certainl}' sut^-gests one of the specimens described hy Lesc^ue- 

 reux as H/ih.^ //ilUa^," also from Florissant. However, the other speci- 

 mens classed with this one make it extremely improl)al)lo that curs 

 is the same. I have, therefore, assumed that it belongs to Rulac (for- 

 merh^ Negundo), the well-known box elder, but it must remain for 

 future collections to settle the question. 



Localitij. — Van Horn's ranch, about 12 miles west of Mount Vernon, 

 Grant County, Oregon. Collected by Knowlton and Merriam, July, 

 1901 (U. S. Nat. Mus., No. 8533). 



Family HIPPOCASTANACE^E. 



^SCULUS SIMULATA n. sp. 

 PI. XV, figs. 1, 2. 



Leaflets rather membranaceous in texture, broadly obovate-lanceolate 

 in shape, somewhat unequal-sided, long, wedge-shaped at base, rather 

 abruptly rounded above to an apparently accuminate apex; margin 

 minutely and regularly serrate throughout except for a short distance 

 just al ove the base; midrib very thick; secondaries numerous, about 

 15 pairs, alternate, close, mainly parallel, forking or breaking up into 

 two or three branches near the margin and ending in the teeth, occa- 

 sionally camptodrome, with flne branches on the outside which enter 

 the teeth; nervilles numerous, thin, mainly percurrent, oblique to the 

 secondaries; flncr nervation producing minute irregular areolie. 



This flne species is represented by several examples, two of the best 

 being flgured. As all are separate leaflets, it is impossible to deter- 

 mine their arrangement. The}' are short-petioled if not quite sessile. 

 The smaller of the flgured specimens has 6 cm. of its length preserved 

 and was probably Ijetween S and 9 cm. long when perfect. It is 4 cm. 

 wide. The larger specimen has above 9 cm. of its length preserved 

 and is 6 cm. wide. The entire length was probably about 15 cm. 



This species seems very close, indeed, to both ^Esculus odandra and 

 jE. glabra^ well-known living species of the eastern United States. 



Zo6Y//%.— -White hill one-half mile east of original Van Horn's 

 ranch locality. Collected by Knowlton and Merriam, July, 1901 (U. S. 

 Nat. Mus., Nos. 8519, 8520)*. 



Family SAPINDACE^. 



Sapindus Merriami n. sp. 



PI. IX, fig. 5. 



Coriaceous in texture, leaflets ovate in shape, obtusely wedge-shaped 

 at base, obtuse at apex, alternate on the rachis; margin entire; midrib 



«Cret. and Tert. FL, p. 194, PI. XLI., fig. 14 only. 



